From owner-freebsd-bugs@FreeBSD.ORG  Wed Oct 10 22:58:28 2012
Return-Path: <owner-freebsd-bugs@FreeBSD.ORG>
Delivered-To: freebsd-bugs@hub.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
 by hub.freebsd.org (Postfix) with ESMTP id 7B75DF86
 for <freebsd-bugs@hub.freebsd.org>; Wed, 10 Oct 2012 22:58:28 +0000 (UTC)
 (envelope-from gnats@FreeBSD.org)
Received: from freefall.freebsd.org (freefall.freebsd.org [8.8.178.135])
 by mx1.freebsd.org (Postfix) with ESMTP id 3A5748FC1C
 for <freebsd-bugs@hub.freebsd.org>; Wed, 10 Oct 2012 22:58:28 +0000 (UTC)
Received: from freefall.freebsd.org (localhost [127.0.0.1])
 by freefall.freebsd.org (8.14.5/8.14.5) with ESMTP id q9AMwSOh003811
 for <freebsd-bugs@freefall.freebsd.org>; Wed, 10 Oct 2012 22:58:28 GMT
 (envelope-from gnats@freefall.freebsd.org)
Received: (from gnats@localhost)
 by freefall.freebsd.org (8.14.5/8.14.5/Submit) id q9AMwShc003810;
 Wed, 10 Oct 2012 22:58:28 GMT (envelope-from gnats)
Resent-Date: Wed, 10 Oct 2012 22:58:28 GMT
Resent-Message-Id: <201210102258.q9AMwShc003810@freefall.freebsd.org>
Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer)
Resent-To: freebsd-bugs@FreeBSD.org
Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org,
 Mateusz Guzik <mjguzik@gmail.com>
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
 by hub.freebsd.org (Postfix) with ESMTP id 4FFA5575
 for <freebsd-gnats-submit@FreeBSD.org>; Wed, 10 Oct 2012 21:37:46 +0000 (UTC)
 (envelope-from nobody@FreeBSD.org)
Received: from red.freebsd.org (red.freebsd.org [IPv6:2001:4f8:fff6::22])
 by mx1.freebsd.org (Postfix) with ESMTP id 39B818FC18
 for <freebsd-gnats-submit@FreeBSD.org>; Wed, 10 Oct 2012 21:37:46 +0000 (UTC)
Received: from red.freebsd.org (localhost [127.0.0.1])
 by red.freebsd.org (8.14.5/8.14.5) with ESMTP id q9ALbk5i054400
 for <freebsd-gnats-submit@FreeBSD.org>; Wed, 10 Oct 2012 21:37:46 GMT
 (envelope-from nobody@red.freebsd.org)
Received: (from nobody@localhost)
 by red.freebsd.org (8.14.5/8.14.5/Submit) id q9ALbk23054399;
 Wed, 10 Oct 2012 21:37:46 GMT (envelope-from nobody)
Message-Id: <201210102137.q9ALbk23054399@red.freebsd.org>
Date: Wed, 10 Oct 2012 21:37:46 GMT
From: Mateusz Guzik <mjguzik@gmail.com>
To: freebsd-gnats-submit@FreeBSD.org
X-Send-Pr-Version: www-3.1
Subject: kern/172577: hwpmc can leak memory on unload
X-BeenThere: freebsd-bugs@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: Bug reports <freebsd-bugs.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-bugs>,
 <mailto:freebsd-bugs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-bugs>
List-Post: <mailto:freebsd-bugs@freebsd.org>
List-Help: <mailto:freebsd-bugs-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-bugs>,
 <mailto:freebsd-bugs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 10 Oct 2012 22:58:28 -0000


>Number:         172577
>Category:       kern
>Synopsis:       hwpmc can leak memory on unload
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Oct 10 22:58:27 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator:     Mateusz Guzik
>Release:        head r241305
>Organization:
>Environment:
>Description:
On unload of hwpmc the following is reported:

Warning: memory type pmc leaked memory on destroy (2 allocations, 512 byt
es leaked).

Cause:
on load pmc_md_initialize() causes some buffers to be allocated
on unload the following code from pmc_cleanup is executed:
              if (md->pmd_cputype == PMC_CPU_GENERIC)
                        pmc_generic_cpu_finalize(md);
                else
                        pmc_md_finalize(md);


pmc_generic_cpu_finalize does not free any memory allocated by functions called by pmc_md_initialize.
>How-To-Repeat:
I have CPU: Intel(R) Core(TM)2 Duo CPU     P9600  @ 2.66GHz (2660.06-MHz K8-class CPU) and ran the following in VirtualBox:

# kldload hwpmc
# kldunlod hwpmc
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: